Plastic shelf



FIG. 1 is a perspective view of our new plastic shelf;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front plan view thereof;

FIG. 5 is a right side plan view thereof, the left plan view being the same; and,

FIG. 6 is a rear plan view thereof. 

CLAIM The ornamental design for a plastic shelf, as shown and described. 